CN103490572B - A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor - Google Patents
A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor Download PDFInfo
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- CN103490572B CN103490572B CN201310418235.8A CN201310418235A CN103490572B CN 103490572 B CN103490572 B CN 103490572B CN 201310418235 A CN201310418235 A CN 201310418235A CN 103490572 B CN103490572 B CN 103490572B
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- 239000000725 suspension Substances 0.000 title claims abstract description 62
- 238000004804 winding Methods 0.000 claims abstract description 79
- 241000239290 Araneae Species 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011217 control strategy Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 241001270131 Agaricus moelleri Species 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
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Abstract
The present invention relates to a kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor, belong to magnetic suspension switched reluctance motor and magnetic suspension bearing field.Motor stator is made up of radial magnetic field motor stator and two magnetic bearing stators, radial magnetic field motor stator and two magnetic bearing stators are salient-pole structure, it is wound with a motor winding on each stator tooth of radial magnetic field motor stator, each stator tooth of magnetic bearing stator is wound with a magnetic bearing winding；Rotor is formed by field spider and two cylindrical rotors are axially stacking, and field spider is between two cylindrical rotors, and field spider is used for producing torque, and cylindrical rotor is used for producing radial and axial suspending power.A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor that the present invention provides, integrates bearing-free switch reluctance motor and axial magnetic suspension bearing, integrated height；Only having a set of winding on axial magnetic bearing stator tooth, and stator is salient-pole structure, optional version is many；Utilizing minimum inductance district to carry out the control that suspends, levitating current is little on the impact of torque current, and Coupling Between Phases effect is little.
Description
Technical field
The present invention relates to a kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor, belong to magnetic suspension switched reluctance motor and magnetic suspension bearing field.
Background technology
Bearing-free switch reluctance motor is the novel magnetically levitated motor of one grown up for 20 end of the centurys.How much classify with the number of winding on stator, have simplex winding bearing-free switch reluctance motor and double winding bearing-free switch reluctance motor.The control strategy of the two is different, but the mechanism that its suspending power and torque produce is identical, it is and is varied in size, to form an asymmetric magnetic flux by control winding current, and then produce direction and the controlled radial suspension force of size, so that motor has rotation and from suspending power.Relative to double winding bearing-free switch reluctance motor, simplex winding bearing-free switch reluctance motor stator only has a set of winding, and structure is the simplest, and control algolithm is simple, it has also become a study hotspot of bearing-free switch reluctance motor and development trend.
There is close coupling between torque and suspending power, and be difficult to realize the full decoupled of the two in control strategy and mathematical model, be one of bearing-free switch reluctance motor runnability principal element of being difficult to improve.Additionally, because suspending power controls required, winding current must be carried out chop control, and during high-speed cruising, the surge of counter electromotive force causes winding current being tracked chop control, i.e. there will be electric current and cut phenomenon incessantly, this leverages the performance of bearing-free switch reluctance motor high speed performance.
Bearing-free motor to realize five-degree magnetic suspension run, need axial magnetic suspension bearing with its with the use of.Axial magnetic bearing will certainly increase the axial length of floatation electric motor system, and then reduces critical speed and power density.Therefore, on the basis of realizing torque and Decoupling control of levitation force, it is achieved bearing-free motor and the integrated study hotspot having become magnetic suspension motor field of axial magnetic bearing.
Summary of the invention
The present invention seeks to propose a kind of to integrate bearing-free motor and axial magnetic bearing, suspending power and torque are the most full decoupled, high-speed adaptability strong, the three-degree-of-freemagnetic magnetic suspension switch reluctance motor of high power density.
The present invention adopts the following technical scheme that
A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor of the present invention, including radial magnetic field motor stator, field spider, cylindrical rotor, radial magnetic field motor winding, magnetic bearing stator, magnetic bearing winding；Motor stator is made up of radial magnetic field motor stator and two magnetic bearing stators, radial magnetic field motor stator and two magnetic bearing stators are salient-pole structure, it is wound with a motor winding on each stator tooth of radial magnetic field motor stator, each stator tooth of magnetic bearing stator is wound with a magnetic bearing winding；Winding on each motor stator tooth can serial or parallel connection be the winding string of certain number of phases on demand, and winding serial or parallel connection respectively or connection in series-parallel on two all stators of axial magnetic bearing are two winding strings；Rotor is formed by field spider and two cylindrical rotors are axially stacking, and field spider is between two cylindrical rotors, and field spider iron core is used for producing torque, and cylindrical rotor is used for producing radial and axial suspending power.
Beneficial effect
A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor that the present invention provides, integrates bearing-free switch reluctance motor and axial magnetic suspension bearing, integrated height；
Only one of which winding on motor stator tooth, relative to double winding bearing-free switch reluctance motor, simple in construction, copper factor is high, saves copper and saves stalloy, it is possible to decrease motor manufacturing cost；
Only having a set of winding on axial magnetic bearing stator tooth, and stator is salient-pole structure, optional version is many；
In structure, radial suspension force and torque and radial suspension force and axial suspension power are full decoupled, and control method is simple, and suspendability is good.
Utilizing minimum inductance district to carry out the control that suspends, levitating current is little on the impact of torque current, and Coupling Between Phases effect is little.
Motor winding utilization is high, and power density is high, and high-speed adaptability is strong.
Accompanying drawing explanation
Fig. 1 is the three dimensional structure sectional view of the three-degree-of-freemagnetic magnetic suspension switch reluctance motor of the present invention；
Fig. 2 is the winding schematic diagram of the three-degree-of-freemagnetic magnetic suspension switch reluctance motor of the present invention
Fig. 3 is the change curve of the winding inductance of the three-phase 12/8 pole bearing-free switch reluctance motor in three-degree-of-freemagnetic magnetic suspension switch reluctance motor of the present invention and electric current and rotor position angle.
Label title in figure: 1 is radial magnetic field motor stator, and 2 is field spider, and 3 is cylindrical rotor, 4 is radial magnetic field motor winding, and 5 is magnetic bearing stator, and 6 is magnetic bearing winding, and 7 is winding inductance, and 8 is suspension stages winding current, 9 torque phase winding currents.
Detailed description of the invention
The present invention is described in more detail below in conjunction with the accompanying drawings:
As shown in Figure 1: the three dimensional structure schematic diagram of three-phase 12/8 pole of the present invention 3DOF magnetic suspension switched reluctance motor, including radial magnetic field motor stator 1, field spider 2, cylindrical rotor 3, radial magnetic field motor winding 4, magnetic bearing stator 5 and magnetic bearing winding 6.Radial magnetic field motor (i.e. bearing-free switch reluctance motor) stator and two axial magnetic bearing stators are salient-pole structure, wherein the motor stator number of teeth is 12, the magnetic bearing stator number of teeth is even number, and motor stator and magnetic bearing stator tooth are all wound with a winding, and winding configuration is concentratred winding；Rotor is passed through axially to be overrided to form by field spider and two cylindrical rotors, and field spider is between two cylindrical rotors, and wherein field spider is used for producing torque, does not produce suspending power, and cylindrical rotor is used for producing radial and axial suspending power, does not produce torque；By controlling the electric current of motor winding, timesharing subregion produces radial suspension force and torque, and the two is full decoupled；By controlling the electric current of two magnetic bearing windings, make two axial air-gap magnetic fluxs asymmetric, and then produce axial suspension power；Utilizing minimum inductance flat-top district as the region of generation radial suspension force, do not produce torque, and motor levitating current is little on the impact of motor torque electric current in this region, motor Coupling Between Phases effect is little.
Fig. 2 is that a phase winding is made up of the coil being distributed in 4 relative teeth, is the most spatially separated by 90 °, and these 4 windings independently control, and timesharing subregion produces suspending power and torque.4 windings of B, C phase are identical with A phase winding structure, differ 30 ° and-30 ° with A phase the most in position.
4 coils of A phase winding rotating around on two pairs of opposed tooth, wherein ia 1+、ia 2+、ia 3+、ia 4+ it is respectively the electric current that 4 windings of A phase flow into, ia 1-、ia 2-、ia 3-、ia 4-respectively A phase be the electric current that 4 windings flow out, α, β represent the both direction of rectangular coordinate system.
Fig. 3 is the change curve of the winding inductance of three-phase 12/8 pole bearing-free switch reluctance motor and electric current and rotor position angle.Definition stator tooth is zero degree position, i.e. aligned position with rotor tooth aligned position.For the bearing-free switch reluctance motor of three-phase 12/8 pole, a rotor cycle angle is 45 °, and therefore the interval of motor every phase winding suspension conducting is 15 °, and the stable suspersion of such guarantee motor runs.Owing to using torque and the subregional control strategy of radial suspension force timesharing, each moment needs two phase windings to simultaneously turn on, and a phase winding is with producing radial suspension force, and another phase winding produces torque.
Bearing-free motor suspension theory is described as a example by A phase, rotor is positioned at [15 °, 30 °] time for suspend interval, now the magnetic conductance of motor magnetic circuit is minimum, inductance value is minimum and constant, this region is called minimum inductance flat-top district, and the bearing-free switch reluctance motor in the present invention utilizes this region to produce radial suspension force exactly；Further, since this interval winding inductance is invariable, therefore do not produce torque, realize torque and suspending power decoupling with this.Rotor is positioned at [15 °, 30 °] time, owing to the magnetic circuit reluctance of cylindrical rotor part is the least relative to field spider, again because radial suspension force is inversely proportional to magnetic circuit reluctance, therefore the radial suspension force that field spider part produces in this interval is negligible relative to cylindrical rotor part, it is provided that the suspending power of bearing-free motor radial suspension is mainly produced by cylindrical rotor.
Concrete radial suspension force control principle is: α direction radial suspension force is by winding current ia 1And ia 3Control, work as ia 1> ia 3Time, α positive direction radial suspension force on product, otherwise, produce α negative direction radial suspension force；In like manner, β direction suspending power is by winding current ia 2And ia 4Control, work as ia 2> ia 4Time, β positive direction radial suspension force on product, otherwise, produce β negative direction radial suspension force；α direction and β direction radial suspension force can synthesize the radial suspension force of any direction, therefore by 4 asymmetric excitations of winding, can produce the suspending power of any radial direction and size, and then realize the motor function that certainly suspends in [15 °, 30 °] interval.In like manner, the radial suspension force that [0,15 °] and [30 °, 45 °] is interval respectively by B phase and the generation of C phase winding, and then can realize the suspension operation in whole rotor cycle.
Being the electronic stage when rotor is positioned at [30 °, 45 °], now inductance is in elevated areas, produces positive torque.At the end of A phase suspension excitation, owing to asymmetric excitation causes the size of current of 4 windings of A phase, it is thus desirable to the identical master power switch driving signal to control A phase winding, first make its four sets winding current identical, then the current control method recycling switched reluctance machines is controlled by, and concrete current control method is chopper current control or PWM control or mono pulse control etc..In like manner, when inductance declines district's conducting, being generator operation, control strategy is similar to the electronic stage.
In view of the symmetry of magnetic circuit, two axial magnetic bearing stator numbers of teeth are even number.Coil on each magnetic bearing stator can series, parallel or connection in series-parallel be a set of winding, and to define Z axis positive direction magnetic bearing winding current be iz 1, Z axis negative direction magnetic bearing winding current is iz 2.Work as iz 1> iz 2Time, Z positive direction axial suspension power on product, otherwise, produce Z negative direction axial suspension power；Therefore by these 2 asymmetric excitations of axial winding, the controlled axial suspension power of arbitrary size and direction can be produced, thus realize axial stable state and suspend.
For those skilled in the art, according to above implementation type can be easy to association other advantage and deformation.Therefore, the invention is not limited in above-mentioned instantiation, it carries out explanation detailed, exemplary as just example to a kind of form of the present invention.In the range of without departing substantially from present inventive concept, those of ordinary skill in the art according to above-mentioned instantiation by the technical scheme obtained by various equivalents, within should be included in scope of the presently claimed invention and equivalency range thereof.
Claims (1)
1. a three-degree-of-freemagnetic magnetic suspension switch reluctance motor, it is characterised in that: include radial magnetic field motor stator (1), field spider (2), cylindrical rotor (3), radial magnetic field motor winding (4), magnetic bearing stator (5), magnetic bearing winding (6)；Motor stator is made up of with two magnetic bearing stators (5) radial magnetic field motor stator (1), radial magnetic field motor stator (1) and two magnetic bearing stators (5) are salient-pole structure, it is wound with a radial magnetic field motor winding (4) on each stator tooth of stator (1), each stator tooth of magnetic bearing stator (5) is wound with a magnetic bearing winding (6)；Rotor is formed by field spider (2) and two cylindrical rotors (3) are axially stacking, and field spider (2) is positioned between two cylindrical rotors (3), and field spider (2) is used for producing torque, and cylindrical rotor (3) is used for producing radial and axial suspending power；This described reluctance motor is three-phase 12/8 pole bearing-free switch reluctance motor, reluctance motor three-phase windings is A phase, B phase, C phase, the interval of every phase winding suspension conducting is 15 °, described each phase winding is made up of the coil being distributed in 4 relative teeth, the most spatially it is separated by 90 °, wherein A phase includes 4 windings, and 4 windings independently control, and timesharing subregion produces suspending power and torque；I in the coil of 4 relative teeth of described A phase windinga 1+、ia 2+、ia 3+、ia 4+ it is respectively the electric current that 4 windings of A phase flow into；ia 1-、ia 2-、ia 3-、ia 4-it is respectively the electric current that 4 windings of A phase flow out；α, β represent the both direction of rectangular coordinate system；α direction radial suspension force is by winding current ia 1And ia 3Control, work as ia 1> ia 3Time, α positive direction radial suspension force on product, contrary generation α negative direction radial suspension force；β direction suspending power is by winding current ia 2And ia 4Control, work as ia 2> ia 4Time, β positive direction radial suspension force on product, contrary generation β negative direction radial suspension force；α direction and β direction radial suspension force can synthesize the radial suspension force of any direction, encourage by 4 windings are asymmetric；And then realize the A phase winding function that certainly suspends in [15 °, 30 °] interval；In like manner, the radial suspension force that [0,15 °] and [30 °, 45 °] is interval respectively by B phase and the generation of C phase winding, and then can realize the suspension operation in whole rotor cycle.
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| CN201310418235.8A CN103490572B (en) | 2013-05-28 | 2013-09-16 | A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor |
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| CN201310418235.8A CN103490572B (en) | 2013-05-28 | 2013-09-16 | A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor |
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| CN103490572B true CN103490572B (en) | 2016-08-24 |
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| CN104009601B (en) * | 2014-05-27 | 2016-02-10 | 南京邮电大学 | A kind of composite construction double winding bearing-free switch reluctance motor |
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| CN107547011B (en) * | 2017-09-19 | 2019-03-12 | 南京埃克锐特机电科技有限公司 | A kind of radial-axial hybrid magnetic bearing switched reluctance motor system and control method |
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| CN108696189A (en) * | 2018-06-30 | 2018-10-23 | 淮阴工学院 | A kind of disc type magnetic suspension switched reluctance motor of journal bearing axial direction electric machine |
| CN108809023B (en) * | 2018-06-30 | 2020-04-24 | 淮阴工学院 | Disc type three-degree-of-freedom magnetic suspension switched reluctance motor |
| CN108988517B (en) * | 2018-07-18 | 2020-09-25 | 江苏大学 | Axial suspension switch reluctance motor |
| CN111102291A (en) * | 2019-12-31 | 2020-05-05 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, compressor and air conditioner |
| CN112054648B (en) * | 2020-09-14 | 2023-05-02 | 重庆交通大学 | Bearing-free switch reluctance linear motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7420308B2 (en) * | 2002-05-24 | 2008-09-02 | Virginia Tech Intellectual Properties, Inc. | PMBDCM and two phase SRM motor, two phase SRM rotor and stator, and coil wrap for PMBDCM and SRM motors |
| CN103441630B (en) * | 2013-06-20 | 2015-12-02 | 南京航空航天大学 | A kind of three-degree-of-freemagnetic magnetic suspension switch reluctance motor of 12/4 electrode structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5952756A (en) * | 1997-09-15 | 1999-09-14 | Lockheed Martin Energy Research Corporation | Permanent magnet energy conversion machine with magnet mounting arrangement |
| CN102306995A (en) * | 2011-08-26 | 2012-01-04 | 北京航空航天大学 | Permanent magnet biased bearingless switched reluctance motor |
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